586 Goleopterological Notices, VII. 



deep ; from the bottom of the sinus projects posteriorly in the 

 same plane a flat, gradually narrowing cluster of agglutinate seri- 

 ceous setse, extending slightly bej^ond the general apex of the 

 segment, its apex emarginate ; second segment having a shallow 

 simple rounded indentation with ill-defined margins, occupying 

 rather less than median third and extending almost to the poste- 

 rior edge ; the anterior margin of the indentation lies far under 

 the apex of the first, and, by longitudinal vision, seems to be re- 

 flexed as is usual in the species of this section. Remainder of the 

 abdomen simple, the last ventral very short. The female is a 

 little smaller and darker in color, with the elytra still shorter, 

 more divergent and straighter at the sides and less convex, the 

 abdominal carinse shorter and apparently less divergent. 



REICH£NBACHIA Leach. 



The species aggregated below under this name form a perfectly 

 natural and isolated division of the Bryaxini, which must conse- 

 quently have generic value. It is probable, moreover, that this 

 generic weight will prove constant throughout the geographic 

 range, and that the so-called connective bonds which have been 

 noted will form types of intermediate genera. Decarthron, Nisaxis 

 and Anchylarthron, of our own fauna, are instances of these. 

 The genus is very extensive within the boundaries of the United 

 States, and will prove troublesome on this account to the student. 

 In the following table all the known species are included, with 

 the exception of three, which will be alluded to below, and the 

 characters throughout are those of the male, except when the 

 other sex is specially designated. In the cases of inepta, neva- 

 densis, complectens and siibtilis, the female is the only sex known, 

 but, in the first of these, the distinguishing features are non- 

 sexual, and in the last two there are characters of taxonomic 

 value in the female antennae, which will be expressed in con- 

 junction with corresponding characters of the same sex in their 

 allies ; the position of nevadensis will be more or less uncertain 

 until the male is discovered, although it undoubtedly belongs to 

 the division with aberrant male antennae. 

 Antennse unmodified in either sex; ahdominal carinse very variable in degree 



of separation 2 



Antennae dissimilar in the sexes, the intermediate joints of the funicle being 

 modified in the male but normal in the female; abdominal carinse always 

 well separated ; pubescence short and subdecumbent 20 



